Dekonrex Oral Drops contain Phenylpropanolamine Hydrochloride (6.25mg per ml) and are used as a decongestant to relieve nasal congestion caused by colds, allergies, or sinusitis. It works by constricting the blood vessels in the nasal passages, which helps reduce swelling and promotes easier breathing. These oral drops come in a 15ml bottle. Always follow the recommended dosage and consult a healthcare provider before use to ensure safe and effective use.